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fatduckling

Member Since: 31 Dec 2021
Location: Sydney
Posts: 8

Drove with the fuel cap open

Hi

After filling up 60L of diesel in my 2011 Defender 110, I forgot to close the fuel cap and drove for about 20 minutes. The roads were clean but it was slightly raining. No warning lights came up on the dashboard.

I'm assuming this would've harmed my engine. Should I do anything or now or just leave it?

Thanks

27th Feb 2022 7:14am

keith

Member Since: 15 Aug 2012
Location: Edinburgh
Posts: 2212

Crikey! Iv lost count of the number of caps left at fuel stations. Even with a full tank there would be minimal loss of fuel. No worries at all. Call the station and they'll keep it till next time your passing.

Keith

27th Feb 2022 7:57am

Leamreject

Member Since: 19 Dec 2020
Location: Middle Earth - Leamington Spa
Posts: 970

The diesel fuel system will deal with a little water content which is normal. You would be very unlucky in light rain to get a large volume enter the recessed filler in just a short space of time. Ride like you stole it!!
If I’m not on a bike it’s because only a 4x4 will do…
2011 2.4 Puma 90 HT

27th Feb 2022 8:49am

jaygti

Member Since: 04 Nov 2012
Location: essex
Posts: 377

I’m always losing mine. I’ve never had a problem even with heavy rain. Although when I notice, I plug it up with something.
I now have a spare in the shed😉 2002 td5 90 county hardtop

27th Feb 2022 4:25pm

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3414

2012 Defender 90 Puma 2.2 CSW Santorini Black

Water will not dilute with diesel, but being heavier will sink to the bottom of the tank. If it gets picked up, it will get trapped in the fuel filter sediment section, as long as not in large quantities. Likewise, condensation in the tank gets trapped in the filter, which is why it is good practice to occasionally drain a bit of fuel from the bottom of the filter. On a 2.4 care should be exercised so as not to allow air into the system as there is no fuel pump in the tank. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

27th Feb 2022 4:44pm

Eduardo

Member Since: 28 Aug 2008
Location: Región Metropolitana
Posts: 2110

2007 Defender 110 Puma 2.4 SW Stornoway Grey

Same here.
I lost at least 2-3 caps. Finally I bougth a cap with a rubber string that is tied to the car, so I dont forget it (same with the defendoor cap)
Anyway some month ago I forgot to put it in place but the noise advice that was not in position.
BTW despite to fill the defender the fuel indicator refuse to go up until I put the cap.

Cheers[/b] Eduardo

MY 2007 110 SW PUMA 2.4: Big Fog of 64'
MY 1994 Jayco 1207 Folding camper: "El Tremendo"

Click image to enlarge

28th Feb 2022 2:00am

Julie

Member Since: 07 Oct 2017
Location: Nantes
Posts: 484

2012 Defender 110 Puma 2.2 SW Keswick Green

Re: Drove with the fuel cap open

fatduckling wrote:
Hi

After filling up 60L of diesel in my 2011 Defender 110, I forgot to close the fuel cap and drove for about 20 minutes. The roads were clean but it was slightly raining. No warning lights came up on the dashboard.

I'm assuming this would've harmed my engine. Should I do anything or now or just leave it?

Thanks

happens. I forgot my cap once because that tiny plastic has been broken.

Keep your filters in good condition , drain water. And trust ...

Not only in Africa, but here in France we're having problems with polluted diesel, too.

28th Feb 2022 9:20pm

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